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Does the 7610 suffer the same problems as the 7300 with close by transmitters or have they addressed that?
On Jul 4, 2018, at 9:34 AM, dalej via Groups.Io <dalej2@...
When I’ve asked the question blocking dynamic range in other forums they always said the two kinds of receivers can’t be tested the same way :). Guess that explains it.Tnx JoeDale, K9VUJOn 04, Jul 2018, at 8:27, Joe Subich, W4TV <lists@...> wrote:On 2018-07-04 4:02 AM, dalej via Groups.Io wrote:
I’m interested in this noise power ratio test that some use to
evaluate receivers. How does that fit in with the K3 ?Noise power testing *can* be extremely confusing when comparingdirect sampling "receivers" like the Flex or IC-7851/7610/7300with IF based SDR receivers like the K3.In practice, proponents of noise power testing reduce the noisepower level until the ADC of the direct sampling receiver nolonger goes into overflow and then measure the IMD products(increase in noise floor in the "notch" region). With IF/filterbased devices the noise power is not reduced. Effectively, thetwo receiver technologies are being tested at different signallevels.The direct conversion receiver is being tested at maximuminterfering signal level but not maximum sensitivity whilethe IF/Filter receiver is being tested at maximum sensitivity.None of the tested direct conversion SDRs are capable of 100+dB "dynamic range" while simultaneously maintaining a MDS of~ -140 dBm unlike a IF/filter receiver (either analog like theK2 or DSP like the K3/K3S).73, ... Joe, W4TVOn 2018-07-04 4:02 AM, dalej via Groups.Io wrote:
I’m interested in this noise power ratio test that some use to evaluate receivers. How does that fit in with the K3 ?
On 03, Jul 2018, at 21:16, N6KR <n6kr@...> wrote:
In response to many questions fielded by our sales and support staff we’ve put together a comparison of the K3S vs. the IC-7610.
While all rigs have certain strengths, the K3S has a combination of performance, features, and form factor that provide unique benefits to the operator, especially those who may encounter high-signal conditions or require portability (or both, as in the case of Field Day, DXpeditions, etc.).
The comparison table is in draft form and will continue to evolve, so we’re not posting it on our website just yet. However, we’ll be happy to send the current edition on request to anyone actively weighing the tradeoffs between the K3S and other transceivers.
Please email me directly if you’re interested. I’ll be happy to expand on information presented, whether theoretical or functional. No doubt these discussions will help us refine the table.